<template>
  <div>
    <div class="data">
      <div class="searchForm">
        <el-form :inline="true" :model="params" class="demo-form-inline">
          <el-form-item label="标题">
            <el-input
              v-model="params.title"
              placeholder="按标题查找"
              class="block"
            ></el-input>
          </el-form-item>
          <el-form-item>
            <el-button
              icon="el-icon-search"
              @click="getList(1)"
              class="block"
              >查询</el-button
            >
            <el-button
              type="primary"
              icon="el-icon-plus"
              @click="add"
              >增加</el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              @click="removeMore"
              >批量删除</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
    <div class="message">
      <div class="message1">
        <el-table :data="rows" stripe style="width: 100%" @selection-change="handleSelectionChange">
          <el-table-column type="selection" width="55"></el-table-column>
          <el-table-column prop="img" label="图片">
            <template slot-scope="scope">
              <img style="width:40px;height:40px;" v-if="scope.row.img" :src="scope.row.img" />
            </template>
          </el-table-column>
          <el-table-column prop="title" label="标题">
          </el-table-column>
          <el-table-column prop="url" label="跳转地址">
          </el-table-column>
          <el-table-column prop="status" label="是否启用">
            <template slot-scope="scope">
              <el-switch
                v-model="scope.row.status"
                active-color="#13ce66"
                inactive-color="#ff4949"
                @change="statusChange(scope.row)"
                :active-value="1"
                :inactive-value="0">
              </el-switch>
            </template>
          </el-table-column>
          <el-table-column label="操作" width="320">
            <template slot-scope="scope">
              <el-button
                type="primary"
                size="mini"
                icon="el-icon-edit"
                style="margin-right:16px;"
                @click="edit(scope.row)"
                >编辑</el-button
              >
              <el-popconfirm
                title="确定删除此数据吗？"
                @confirm="remove(scope.row)"
              >
                <el-button 
                  type="danger"
                  size="mini"
                  icon="el-icon-delete"
                  slot="reference">删除</el-button>
              </el-popconfirm>
            </template>
          </el-table-column>
        </el-table>
      </div>
    </div>
    <div class="pagination">
      <el-pagination
        @size-change="sizeChange"
        @current-change="getList"
        :current-page="params.pageNum"
        :page-sizes="[5,10, 100, 200, 300, 400]"
        :page-size="params.pageSize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </div>
    <el-dialog :title="form._id ? '修改' : '新增'" :visible.sync="dialogFormVisible" width="400px">
      <el-form :model="form" ref="form" :rules="rules" label-width="100px">
        <el-form-item label="图片" prop="img">
          <upload
            action="/upload"
            :cicle="false"
            :width="300"
            :height="300"
            :on-success="onSuccess">
            <img style="max-width:100%;max-height:100%;" v-if="form.img" :src="form.img" class="avatar">
            <div v-else style="border:1px dashed #e4e4e4;width:100px;height:100px;line-height:100px;text-align:center;"><i class="el-icon-plus avatar-uploader-icon"></i></div>
          </upload>
        </el-form-item>
        <el-form-item label="标题" prop="title">
          <el-input type="text" v-model="form.title"></el-input>
        </el-form-item>
        <el-form-item label="跳转地址" prop="url">
          <el-input type="text" v-model="form.url"></el-input>
        </el-form-item>
        <el-form-item label="类型" prop="type">
          <el-select v-model="form.type" placeholder="请选择">
            <el-option
              v-for="type in types"
              :key="type.value"
              :label="type.label"
              :value="type.value">
            </el-option>
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="submit">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import api from '@/api'
import upload from '@/components/Upload'
export default {
  name: "shouyeBanner",
  components: {
    upload
  },
  data() {
    return {
      ///查询参数
      params:{
        title:'',
        type:'banner',
        pageNum:1,
        pageSize:5
      },
      rows:[],
      total:0,
      dialogFormVisible:false,
      form:{
        _id:0,
        img:'',
        type:'banner',
        url:'',
        title:''
      },
      rules:{
        img:[
          { required: true, message: '图片不能为空', trigger: 'blur' }
        ]
      },
      types:[
        {label:'轮播图',value:'banner'},
        {label:'分类区',value:'category'},
        {label:'为您推荐',value:'recommend'}
      ],
      selecteds:[]
    }
  },
  methods: {
    onSuccess(res){
      //拼装图片路径赋值给表单
      this.form.img = api.baseURL + '/' + res.path
    },
    ///获取列表
    getList(pageNum){
      if(pageNum) this.params.pageNum = pageNum
      this.$http({
          url:'/admin/index',
          params:this.params
      }).then(res => {
        this.total = res.total
        this.rows = res.rows
      })
    },
    ///启用停用
    statusChange(row){
      this.$http({
        url:'/admin/index',
        method:'PUT',
        data:{
          indexId:row._id,
          status:row.status
        }
      }).then(res => {
        if(res.errorMsg){
          this.getList()
        }
      })
    },
    ///修改pageSize
    sizeChange(pageSize){
      this.params.pageSize = pageSize
      this.getList(1)
    },
    add(){
      ///初始化
      this.form = {
        _id:0,
        img:'',
        type:'banner',
        url:'',
        title:''
      }
      this.dialogFormVisible = true
    },
    edit(row){
      this.form = row
      this.dialogFormVisible = true
    },
    ///删除数据
    remove(row){
        this.$http({
          url:'/admin/index',
          method:'DELETE',
          params:{indexId:row._id}
        }).then(res => {
          if(!res.errorMsg){
            this.getList(1)
          }
        })
    },
    handleSelectionChange(rows){
      ///存储选中数据
      this.selecteds = rows
    },
    ///批量删除
    removeMore(){
      ///获取被选中的数据
      let checkedRowsPrmose = []
      let success = [],fail = []
      for(let i = 0; i < this.selecteds.length; i ++){
        checkedRowsPrmose.push(
          new Promise(resovle => {
            let row = this.selecteds[i]
            this.$http({
              url:'/admin/index',
              method:'DELETE',
              params:{indexId:row._id}
            }).then(res => {
              if(!res.errorMsg){
                success.push(row._id)
              }else{
                fail.push(row._id)
              }
              resovle()
            })
          })
        )
      }
      this.$confirm('此操作将删除选中的数据, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        ///删除
        Promise.all(checkedRowsPrmose).then(() => {
          this.$message({
            message: `批量删除完成，成功删除${success.length}条数据,删除失败${fail.length}条数据`,
            duration:3000
          });
          this.getList(1)
        })
      })
      
    },
    submit(){
      this.$refs.form.validate(valid => {
        if(valid){
          this.form.indexId = this.form._id
          this.$http({
            url:'/admin/index',
            method:this.form.indexId ? 'PUT' : 'POST',///通过indexId判断新增还是修改
            data:this.form
          }).then(res => {
            if(!res.errorMsg){
              this.dialogFormVisible = false
              this.getList(this.form.indexId ? undefined : 1)
            }
          })
        }
      })
    }
  },
  created() {
    this.getList()
  },
  mounted() {}
};
</script>

<style scoped>

</style>